Concentration of Some Metal Ions Using 2-(5-Bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol and C18-Bonded Silica Gel

A simple and reliable concentration method of trace metals in aqueous solution is proposed. 2-(5-Bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol is used to form water-soluble metal chelates. The chelated metal ions are concentrated from dilute solution by adsorption onto a C18-bonded silic...

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Bibliographic Details
Published inAnalytical Sciences Vol. 14; no. 2; pp. 317 - 320
Main Authors NAKAGAWA, Koichi, HARAGUCHI, Kensaku, OGATA, Toshio, KATO, Takunori, NAKATA, Yukinori, AKATSUKA, Kunihiko
Format Journal Article
LanguageEnglish
Published Tokyo The Japan Society for Analytical Chemistry 1998
Japan Society for Analytical Chemistry
Japan Science and Technology Agency
Subjects
Analytical chemistry
Chemical and thermal methods
Chemistry
Exact sciences and technology
Adsorption
Chemical method
Organic ligand
Preconcentration
Aryloxy complex
Silica gel
Transition metal Complexes
Aqueous solution
Copper Complexes
Saline solution
Chemical enrichment
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Summary:A simple and reliable concentration method of trace metals in aqueous solution is proposed. 2-(5-Bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol is used to form water-soluble metal chelates. The chelated metal ions are concentrated from dilute solution by adsorption onto a C18-bonded silica gel column. The adsorbed chelates are eluted with methanol and 1.0 mol dm-3 HCl and determined by ICP-AES or flame AAS. The proposed method is applied to the determination of heavy metal impurities in some commercial sodium salt reagents.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.14.317